Britney Spears Set For Marriage No. 3?

First she was snapped wearing her old wedding dress, then there was the trip to an L.A. church – and now Britney Spears has been spotted wearing what some sources claim is an engagement ring.

Brit flashed a diamond rock on her ring finger on Tuesday, prompting further speculation that she plans to rush into a third ill-advised marriage with current photographer beau Adnan Ghalib.

A source tells PageSix that K-Fed “flipped out” after Brit called him to say that she was getting hitched.

More disturbingly, OK! magazine is reporting that the pop wreck wants another child now that she has lost both custody and visitation rights to sons, Sean Preston and Jayden James.

"Britney hates when things are taken from her," a family member of Kevin Federline tells the issue.

"The court's taken Preston and Jayden away, so she'll just have another kid to take their place. That's the way she thinks."

In the words of Brit - wha?!!!

Click here to see Brit's ring as she hits up yet another L.A. store with her suspect pap companion.